Exploring app-based autonomous English vocabulary learning: strategies, motivation and challenges among Vietnamese learners. The International Journal of Language Studies (ISSN : 3078 - 2244), [S. l.], v. 2, n. 4, p. 24–31, 2025. DOI: 10.60087/ijls.v2.n4.003. Disponível em: https://ijlangstudies.org/index.php/home/article/view/95. Acesso em: 5 feb. 2026.